added community links

I am not sure if it also makes sense to link the github-wiki
(https://github.com/webfinger/webfinger.net/wiki)
move link to example client to code page
move logo to community page

also wrap existing content on community page and move links to after
text.
de-emphasize footer a bit
start using Sass for CSS

no style changes in this commit, just setting up the structure. More to
come.
reset styles with normalize (git.io/normalize)
restructure style.scss using nested properties

no substantive changes... resulting css should be pretty much identical
start of better mobile display

- set viewport to device width
- prevent search input from stretching page
fix typo
move lookup form to header
remove link to client.webfinger.net